Richard f



(No Mbdel.)

' R..F. ABBE. GRINDING AND PULVERIZINGCYLINDER. No. 529,096.-

Patented Nov. 13, 1894.

' A TTOHNE Y8.

WITNESSES:

jm: mam; PETERS w, PHOTO-Lima. wAsHm UNITE STATES RICHARD F. ABBE, OF BROOKLYN, ASSIGN OR TO THE J. R. ALSING COMPANY,

, OF NEW YORK, N. Y.

GRINDING AND PULVERIZING CYLINDER.

SPECIFICATION forming part of Letters Patent No. 529,096, dated November 13, 1894.

I Application filed November 21. 1893. Serial No. 491,545. (No model.)

To all whom it may concern: The material passes into the chute F on the Be it known that I, RICHARD F. ABBn,a citiinlet-box from a hopper G and said chute is zen of the United States, and a resident of provided with an intermittent rotary feeding Brooklyn, in the county of Kings and State of device F of any Well known construction. In 5 New York, have invented certain new and the opposite head or end of the cylinder A, useful Improvements in Grinding and Pulversimilar helical openings a are formed around izing Cylinders, of which the following is a the center, but which have a pitch that is the specification. reverse of the pitch of the openings at as the This invention relates to improvements in said openings also serve to draw material into 10 that class of grinding and pulverizing mathe cylinder while at the same time serving to chines, in which the material to be treated is permit the blast of air to carry the fine ground placed into a rotary cylinder partially filled material into an outlet-box J connected with with porcelain balls or other hard spherical an outlet duct K provided with a suitable colbodies, the material being crushed and broken lector or receiver L. An air compressing der 5 by said balls as the cylinder rotates. vice M is connected bya pipeNwith the inlet- The object of my invention is to provide a box E. new and improved machine of this kind in In place of connecting the pipeN with the which the material to be treated is drawn into inlet-box E it may be connected with the end one end of the cylinder. The fine material is Of the Shaft B, Which in this case is provided 20 carried off by a current of air at the opposite with alongitudinal bore and with radial bores end of the cylinder into an outlet duct and at the inner end of said longitudinal bore as the material accumulating in said duct and shown in Fig. 1, in dotted lines. which is too heavy to be carried off by the The operation is as follows: Thecylinder is current of air, is drawn back into the cylinfilled to about half its height with porcelain 25 der to be reground. balls or pebbles of which some are shown in In the accompanying drawings, Figure 1 is Fig. 1, and the cylinder is rotated, the matea central vertical longitudinal sectional view rial being fed through the hopper G, the chute of my improved grinding and pulverizing cyl- F and inlet-box E. As the helical openings inder. Fig. 2 is a vertical transverse seca have a pitch from the interior side of the 3o tional View on the line 2, 2, Fig. 1. end of the cylinder to the exterior, in the Similar letters of reference indicate correirection in which the cylinder rotates, they sponding parts. act as conveyer-screws and draw the material The cylinder A which is preferably lined from the outlet-box into the cylinderwhere the with porcelain is fixed on the shaft B, extendmaterial is crushed, disintegrated and pulver- 3 5 ing centrally and longitudinally through the ized by the balls or pebbles. The compressed cylinder, 'said shaft being mounted on suitair passing into the I cylinder through the able bearings O. A cog-wheel D is fixed on openings a at one end of the cylinder and out the shaft B and engages a pinion D by means through the openings 0. at the opposite end, of which it is driven. The cylinder is procarries the finely ground particles of material 0 4o vided at one end with a series of helical or and conveys them through the outlet-box and screw openings or arranged around the shaft duct K into the collector, from where they B, whichhelical openingsareso arranged and can be conveyed into suitable receptacles. shaped as to have a pitch from the inside to The pressure of the current of air admitted the outside in the same direction in whichthe into the cylinder is regulated according to the 5 45 cylinder is rotated and serve to draw and feed degree of fineness at which the material is to the material from a fixed inlet-box E into be removed from the cylinder. For example, one end of the cylinder. The inlet-box rests when the material is light or is to be removed against the outer surface of that head or end when it has reached a high degree of fineof the cylinder, in which said openings aare ness, a slight current of air will suffice; but 10: 50 formed, the openings establishing communiwhen the material is heavy or is to be recation between the inlet-box and the cylinder. moved when still comparatively coarse, a

greater air pressure is required. Some of the particles carried by the current of air drop back to the bottom of the outlet-box J and would eventually prevent the passage of the current of air and particles or at least materially retard the same. As the openings a are also made helical and have the reverse pitch of the openings or, they also serve to draw the material accumulating in the bottom of the outlet-box J, back into the cylinder, Where it is reground until it has the desired degree of fineness, and can be carried into the collector L by the current of air.

I claim- The combination, with a cylinder mounted 1 to rotate on a horizontal axis and having helical openings in each end around the center, the openings in the two ends having the reverse pitch, and said openings in both ends serving to draw material into the cylinder, boxes placed against the ends of the rotating cylinder to which boxes the openings in the ends of the cylinder lead, a feed chute connected with the box at one end of the cylinder, an outlet duct connected with the box at the opposite end of the cylinder and means for conducting air under pressure into the cylinder, at that end of the cylinder at which the feed chute is located, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

RICHARD F. ABBE.

Witnesses:

()SCAR F. GUNZ, K. R. BRENNAN. 

